Which of the following is an argument in support of federalism? it focuses authority in the hands of the states, who share no powers with the national government. a. it focuses authority in the hands of the states, who share no powers with the national government. b. it prevents any one person from having too much authority. c. it limits authority to one or two key branches of government. d. it prevents the national government from being inefficient by granting it the same powers as the states.